/* Soot - a J*va Optimization Framework
 * Copyright (C) 2003 Jerome Miecznikowski
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the
 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
 * Boston, MA 02111-1307, USA.
 */

package soot.dava.toolkits.base.misc;

import soot.jimple.*;
import soot.grimp.internal.*;

public class ConditionFlipper
{
    public static ConditionExpr flip( ConditionExpr ce)
    {
	if (ce instanceof EqExpr) 
	    return new GNeExpr( ce.getOp1(), ce.getOp2());

	if (ce instanceof NeExpr)
	    return new GEqExpr( ce.getOp1(), ce.getOp2());

	if (ce instanceof GtExpr)
	    return new GLeExpr( ce.getOp1(), ce.getOp2());

	if (ce instanceof LtExpr)
	    return new GGeExpr( ce.getOp1(), ce.getOp2());

	if (ce instanceof GeExpr)
	    return new GLtExpr( ce.getOp1(), ce.getOp2());

	if (ce instanceof LeExpr)
	    return new GGtExpr( ce.getOp1(), ce.getOp2());

	return null;
    }
}
